Construction in downtown Louisville has caused minor changes on the 2018 Kentucky Derby Festival Marathon and miniMarathon routes on April 28.

Recent lane closures on Main Street between Fourth and Seventh streets have led event organizers to divert runners around the area. Participants in both races will now run west on Market Street for those blocks before being led back on to Main Street at Seventh.

Check out the map below to see the full route:

Both races are scheduled to start at 7:30 a.m. Saturday on Main Street and will wrap up at Preston and Witherspoon streets. No other changes to race operations or parking were made. Louisville Metro Police officials will be along the route to help with vehicle cross-traffic at intersections and other issues.

“All downtown traffic is being rerouted on Main Street in this area and the Kentucky Derby Festival is no exception,” said Shanna Ward, Race Director for the Kentucky Derby Festival, in a statement. “Fortunately because these are minor changes to the course, they will have minimal impact on the runners’ experience.”